Planing machine



Sept. 16, 1930. w. w. M CARROLL PLANING MACHINE Filed Nov. 27, 1928 3 Sheets-Sheet 1 Se t. 16, 1930. w. w. MCCARROLL PLANING MACHINE Filed Nov. 27, 1928 3 Sheets-Sheet 2 p 16, 1930. w. w. MCCARROLL PLANING MACHINE Filed Nov. 27, 1928 3 Sheets-Sheet 3 Patented Sept. 16, 1930 PATENT OFFICE warring w. eoA RoLL, on NEW HAVEN, CONNECTICUT PLANING MACHINE Application filed November 27, 1928. Serial No. 322,206.

This invention relates to planing machines and pertains more particularly to machines of this character employed in roughing of H planing electrotype plates and the like.

" The primary object of the invention is to provide improved means for clearing the plate of the cutting tool during idling or retrograde movement of the latter, thereby to eliminate dragging of the tool over the plate and consequent injury to or spoiling of the plate.

Heretofore it has been customary to provide a resilient mounting for 'the tool which during idling stroke thereof gives sufliciently to permit the tool to drag over the plate, but

this has proven objectionable, since the tool being maintained under tension chatters and nicks the plate, the nicking causing chips which result from the removal of the nicks by the tool on its working stroke. These chips accumulate and find their way beneath the rollers which hold the plate onto the bed,

with the result that the rollers cannot hold the plate uniformly 0r truly parallel to and on the bed, so that the tool cuts deeper into the high points of the plate than into the low points thereof, and may even jam the machine with consequent damage thereto as well as destruction of the plate.

The present invention aims to eliminate the foregoing objections and thereby to increase the life and effectiveness of the cutting tool.

In the drawings Fig. l is a side elevation of the invention, the plate being shown in section;

Fig. 2 is a top plan view;

Fig. 3 is a view similar to Fig. 1, but showing the parts on the idling stroke of the tool;

Fig. 4 is a view similar to Fig. 1, showing the parts at the commencement of the working stroke;

Fig. 5 is a view similar to Fig. 1 of a modified form of the invention, and

Fig. 6 is a top plan view of Fig. 5.

In proceeding in accordance with the present invention, 1 indicates the movable bed or table of the machine upon which the plate P is mounted. A drive wheel 2 has an eccentric rod or link 3 connected thereto, the latter being pivoted at 4 to a tool carrier or head 5 which is slidably mounted on a horizontal track or guide 6 that is mounted above the table 1.

A cutting tool 7 is rigidly secured in a holder 8 which latter is pivoted between its ends at 9 to the carrier 5. The rear side 10 of the holder is formed to abut a wall 11 on the working stroke of the tool thereby to hold the latter firm and rigid.

A yoke 12 is mounted on the rod 3 between the ends thereof and is pivoted at 13 to a guide 14 which is slidably mounted on a rod 15. The rod 15 is pivoted at 16 to the upper end of the holder 8 and at its rear is supported by the guide 14. A stop collar 17 is mounted on the rod 15 and is abutted by a coil spring 18 encircling rod 15, the opposite end of which spring abutsthe guide 14. A similar stop collar 19 is secured to the rod 15 so as to engage the guide 14 when the parts are in the position of Fig. 4.

In operation, and as depicted in Fig. 1, on the working stroke of the tool, the rod 3 moves the carrier 5 forwardly, and the spring 18 becomes compressed as shown in Fig. 1, causing the tool holder to be held against the wall 11 of the carried 5. As the rod 3 moves forwardly, as shown in Fig. 1, the spring is fully compressed, thereby efi'ecting rigid and firm holding of the cutting'tool. Uponthe idling or retrograde movement of the carrier 5, as shown in Fig. 3, the rod 3 moves rea-rwardly causing corresponding movement of the carrier 5 and therewith the tool holder and at the same time movement of the holder about its pivot, due to guide 14 engaging collar 19 and moving rod 15 rearwardly thereby effecting raising of the tool up from the plate P leaving free space between the two, so that there is no contact whatever between the plate and tool.

In Figs. 1 to 4 of the invention, the drive wheel 52 rotates counter-clockwise, while in the modified form of Figs. 5 and 6, the drive wheel 2' moves clockwise. Inthe latter form of the invention, the rod or link 3 is pivoted to the head 5, which latter is-slidable on the guide 6. The tool carrier 8 is pivoted to the carrier, while the. yoke 12 is pivoted to a guide 14' that slides on a rod 15', all

1 of which parts are'connnon to the form ofthe invention in Figs. lfto L The rod however, is pivoted at t'o'jthe lower endof a lever 21 which latter is pivoted between :its ends at 22 m the carrier 5?. AL link 23 is pivoted to the upper end of the 1ever21 and to the upper end ofthe tool carrier 8/. A'eoil 7 spring 24' encircles rod 15", and at oneend 1 abuts guide 14, while its opposite end abuts .collar 25 is rigidlycsecured to, rod 15'; and is a stopcollar 25-m0unted on the rod. A second engageable with tlie'iront end of guide 14:; I

- the tool carrienfirmly What is claimed is 7 In operation, of the modified form of the invention, it willbe noted that upon idling carrier, actuating rneans,; a wpitl'nan connect supported by, said yoke, and spring means ing the actuating means andcarrier, a,piv- 5 oted yoke securedvintermediate the ends of I the pitman, a rod having one end secured to the tool holder and its opposite end slidably' carried by said rod intermediate theyokje'and tool holdr tonormallyjurg the us into engagenientWith the work'when tliee'a'rrier' signature. o a

is moved in onedirection. r In testimony-whereof Iaflix my I WALKER W; MCCARROLL.

or retrograde movementofthetool'carrier,v 3 the rod 3 moves rearwardly and efiects corresponding movement of the rod 1 5,, the collar 25 engaging collar lethereby causing therod 15 to rock lever 21 and the tool car rier, through linkj23, shownfin Fig. 5, thus raising the tool upwardly and out of engagement withftheplatel As the rear f end of rod 3 approaches and then passes dead center. on its downward movement, rodv 151 -islowered, effecting forward movement of the upper end of lever 21 and therethrough link 23, so as to move the lower end of the tool carrier rearwardly and against the'abut ment 11' of the head 5'; The spring24edur ing movement of rod 3 onits working1 stroke r i said carrier, actuating means, a pitman connectlng-the actuatlng means and carr er, a

yoke pivoted intermediate the ends of the itmamanda'rod having one end pivotedto theupperend ofthetool holder and its opr I 'posite end" slidably supported by said yoke, whereby t'o'rock thetool out ofeng'agement" r i 45, I i in one direction.

with the work upon movement of thecarrier 2. In a planing machine, a'jwork tablefa movable"carrier overlying said table and formed with xa-i'stop, a tool holder'pivotallysecured to the carrier adjacent said step, and having its upper end terminating above said carrier, actuating means, alpitman connects ing the actuating means and carrier, a vertically extending yoke pivoted intermediate secured to the upper end ofthe toolholder the ends of the pitrnan, a rod having one end. i

and its, oppositeendfslidably supported by 7 said yoke, and spring means on said rod inter? j mediate the upper endof the, tool holder and;

yoke whereby to urge said holder against said stop when the carrier is 'reciprocated V in onedirection. j

r. 3. In. aplaning machine, a work table,a I

movable carrier overlying said table,iatool; holder pivoted intermediate its endsjto said,- 

